This study investigates the tissue contrast for QSM of
ex
vivo
rodent
hearts at 9.4 T in comparison to T
2
*
mapping.
Results show that QSM can provide a higher contrast for
myocardial fiber structures than magnitude images and T
2
*
maps,
without using contrast agents. Susceptibility maps
showed good correlation with histological images from
literature. This observation provides encouragement that
QSM might be a useful tool for assessing myocardial
microstructure and could provide further insights into
myocardial fiber arrangement and myolaminar structure.

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